/*
 *   Copyright 2008 Francois Fernandes
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */
package com.googlecode.opendoclibrary.internal.impl.fs.meta;

import java.util.Map;
import java.util.Map.Entry;

import com.googlecode.opendoclibrary.library.spi.RegisteredNamespace;

final class VirtualRegisteredNamespacesEntry implements Entry<String, String>
{
    private final RegisteredNamespace rn;

    public VirtualRegisteredNamespacesEntry( RegisteredNamespace rn )
    {
        this.rn = rn;
    }

    @Override
    public final boolean equals( Object o )
    {
        if ( !( o instanceof Map.Entry ) )
        {
            return false;
        }
        Map.Entry e = (Map.Entry) o;
        Object k1 = getKey();
        Object k2 = e.getKey();
        if ( k1 == k2 || ( k1 != null && k1.equals( k2 ) ) )
        {
            Object v1 = getValue();
            Object v2 = e.getValue();
            if ( v1 == v2 || ( v1 != null && v1.equals( v2 ) ) )
            {
                return true;
            }
        }
        return false;
    }

    public final String getKey()
    {
        return rn.getNamespacePrefix();
    }

    public final String getValue()
    {
        return rn.getNamespaceURI().toString();
    }

    @Override
    public final int hashCode()
    {
        return ( getKey() == null ? 0 : getKey().hashCode() ) ^ ( getValue() == null ? 0 : getValue().hashCode() );
    }

    public final String setValue( String newValue )
    {
        throw new UnsupportedOperationException();
    }

    @Override
    public final String toString()
    {
        return getKey() + "=" + getValue();
    }
}